1 Lyncis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lynx |
| Right ascension | 06h 17m 54.81907s[1] |
| Declination | +61° 30′ 55.0251″[1] |
| Apparent magnitude (V) | 4.95[2] |
| Characteristics | |
| Spectral type | M3IIIab[3] |
| U−B color index | +1.96[2] |
| B−V color index | +1.83[2] |
| Variable type | Semiregular variable |
| Astrometry | |
| Radial velocity (Rv) | 11.56±0.44[4] km/s |
| Proper motion (μ) | RA: –10.59 ± 0.36[1] mas/yr Dec.: -3.11 ± 0.29[1] mas/yr |
| Parallax (π) | 5.11 ± 0.33[1] mas |
| Distance | 640 ± 40 ly (200 ± 10 pc) |
| Details | |
| Luminosity | 2,848[5] L☉ |
| Temperature | 3,485[5] K |
| Other designations | |
1 Lyncis, also known by its variable star designation of UW Lyncis, is a star in the constellation Lynx. It is a red giant of spectral type M3III. It has been classified as a slow irregular variable,[7] after being found to be slightly variable in 1969 by Olin J. Eggen.[8] Its changes in brightness are complex, with two shorter changeable periods of 35–40 and 47–50 days due to the star's pulsations, and a longer period of 1500 days possibly due to the star's rotation or convectively induced oscillatory thermal (COT) mode.[9]
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- 1 2 3 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. SIMBAD. Bibcode:1986EgUBV........0M.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x.
- ↑ Famaey, B.; et al. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics 430: 165–186. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272.
- 1 2 McDonald, I.; et al. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society 427 (1): 343–57. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x.
- ↑ "1 Lyncis". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 9 March 2016.
- ↑ Watson, Christopher (4 January 2010). "UW Lyncis". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2016.
- ↑ Eggen, Olin J. (1969). "Light Variations of Small Amplitude in the Red Giants of the Disc Population". Information Bulletin on Variable Stars (355, #1. (IBVS Homepage)). Bibcode:1969IBVS..355....1E.
- ↑ Percy, John R.; Wilson, Joseph B.; Henry, Gregory W. (2001). "Long-Term VRI Photometry of Small-Amplitude Red Variables. I. Light Curves and Periods". The Publications of the Astronomical Society of the Pacific 113 (786): 983–96. Bibcode:2001PASP..113..983P. doi:10.1086/322153.
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